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[  143.792910] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  143.793125] WARNING: CPU: 0 PID: 2599 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  143.794813] Modules linked in:
[  143.795119] CPU: 0 UID: 0 PID: 2599 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-next-20250605 #1 PREEMPT(voluntary) 
[  143.796369] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  143.796701] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  143.797066] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  143.797570] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 bb 41 87 00 48 c7 c1 e0 cb dd b8 4c 89 fa 48 c7 c7 40 cc dd b8 48 89 c6 e8 02 ea 7a fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  143.799197] RSP: 0000:ffff888108ab7b68 EFLAGS: 00010282
[  143.799816] RAX: 0000000000000000 RBX: ffff888108ab7c40 RCX: 1ffffffff7364c5c
[  143.800525] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  143.800907] RBP: ffff888108ab7b90 R08: 0000000000000000 R09: fffffbfff7364c5c
[  143.801672] R10: 0000000000000003 R11: 00000000000393d8 R12: ffff888108ab7c18
[  143.802328] R13: ffff888108562800 R14: ffff888108b39000 R15: ffff88810a234300
[  143.802552] FS:  0000000000000000(0000) GS:ffff8881a025d000(0000) knlGS:0000000000000000
[  143.803284] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  143.803941] CR2: 00007ffff7ffe000 CR3: 00000001482bc000 CR4: 00000000000006f0
[  143.804628] DR0: ffffffffbae67400 DR1: ffffffffbae67401 DR2: ffffffffbae67403
[  143.805101] DR3: ffffffffbae67405 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  143.805325] Call Trace:
[  143.805430]  <TASK>
[  143.805539]  drm_test_framebuffer_free+0x1ab/0x610
[  143.806015]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  143.806594]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  143.807275]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  143.807893]  ? __drmm_add_action_or_reset+0x22/0x50
[  143.808472]  ? __schedule+0x10cc/0x2b60
[  143.808918]  ? __pfx_read_tsc+0x10/0x10
[  143.809390]  ? ktime_get_ts64+0x86/0x230
[  143.809821]  kunit_try_run_case+0x1a5/0x480
[  143.810058]  ? __pfx_kunit_try_run_case+0x10/0x10
[  143.810539]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  143.810870]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  143.811261]  ? __kthread_parkme+0x82/0x180
[  143.811754]  ? preempt_count_sub+0x50/0x80
[  143.812288]  ? __pfx_kunit_try_run_case+0x10/0x10
[  143.812709]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  143.812913]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  143.813623]  kthread+0x337/0x6f0
[  143.814056]  ? trace_preempt_on+0x20/0xc0
[  143.814478]  ? __pfx_kthread+0x10/0x10
[  143.814898]  ? _raw_spin_unlock_irq+0x47/0x80
[  143.815214]  ? calculate_sigpending+0x7b/0xa0
[  143.815383]  ? __pfx_kthread+0x10/0x10
[  143.815525]  ret_from_fork+0x116/0x1d0
[  143.815685]  ? __pfx_kthread+0x10/0x10
[  143.815844]  ret_from_fork_asm+0x1a/0x30
[  143.816213]  </TASK>
[  143.816610] ---[ end trace 0000000000000000 ]---